Elissalde, Catherine and Chung, U-Chan and Josse, Michaël and Goglio, Graziella and Suchomel, Matthew R. and Majimel, Jérôme and Weibel, Alicia and Soubie, F. and Flaureau, Andréas
and Fregeac, Arnaud
and Estournès, Claude
Single-step sintering of zirconia ceramics using hydroxide precursors and spark plasma sintering below 400°C.
(2019)
Scripta Materialia, 168. 134-138. ISSN 1359-6462
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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 2MB |
Official URL: https://doi.org/10.1016/j.scriptamat.2019.04.037
Abstract
The densification of zirconia at very lowtemperatures (b400 °C) requires enhanced synergy between thermodynamics and kinetics. This work demonstrates an efficient single step approach combining amorphous hydrated zirconia and Spark Plasma Sintering at 350 °C and 600 MPa. The resulting zirconia ceramics exhibit a cohesive nanostructure with small average grain sizes (20 nm) and a predominantly monoclinic structural polymorph confirmed by both X-ray scattering analyses and High Resolution Transmission Electronic Microscopy. Remarkable Vickers hardness of 3.8 GPa for high level of porosity (30%) is explained by the density and homogeneous distribution of grains boundaries and meso/microporosities.
Item Type: | Article |
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Audience (journal): | International peer-reviewed journal |
Uncontrolled Keywords: | |
Institution: | French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) Other partners > Institut Polytechnique de Bordeaux - IPB (FRANCE) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) Other partners > Université de Bordeaux (FRANCE) |
Laboratory name: | |
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Deposited On: | 29 May 2019 14:02 |
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